The North Pacific: an Example of Tectonics on a Sphere

  title={The North Pacific: an Example of Tectonics on a Sphere},
  author={Dan McKenzie and Richard L. Parker},
Individual aseismic areas move as rigid plates on the surface of a sphere. Application of the Mercator projection to slip vectors shows that the paving stone theory of world tectonics is correct and applies to about a quarter of the Earth's surface. 
Variable Seafloor Spreading off Baja California
The theory that the Earth's crust is divided into stable plates which were created at oceanic ridge crests, move as whole units and are subsequently destroyed in oceanic trenches is supported.
Plate Tectonics of the Mediterranean Region
The seismicity and fault plane solutions in the Mediterranean area show that two small rapidly moving plates exist in the Eastern Mediterranean, and such plates may be a common feature of contracting
Plate Tectonics of the Red Sea and East Africa
The relative motion between the plates on each side of the East African Rift Valley can be obtained from the opening of the Red Sea and the Gulf of Aden. The calculated direction of relative motion
Constraining the Uplift History of the Al Hajar Mountains, Oman
Mountain building is the result of large compressional forces in the Earth’s crust where two tectonic plates collide. This is why mountains only form at plate boundaries, of which the Al Hajar Moun
Geophysics on a plate
Sue Bowler rereads a classic 1971 paper on plate tectonics by Dan McKenzie and John Sclater, which highlights the geophysical heritage of the RAS.
Crustal Plates in the Central Atlantic: Evidence for at Least Two Poles of Rotation
The radius of curvature of the fracture zone changes at about 47�45'W; this suggests that the fractures in the Mid-Atlantic Ridge was generated by rotation of crustal plates about at least two sequential poles.
Alternative interpretation for the active zones of Cuba
An alternative explanation to the seismoactivity of Cuban faults is presented. The model is a consequence of the interaction between Caribbean and North American plates. It is made with 12 geodynamic
Plate Tectonics, Orogeny and Continental Growth
Ocean-driven plate mechanisms have been responsible for the growth and evolution of continents for at least 3 × 109 years, the authors conclude.


The Alaska earthquake of July 10, 1958: Movement on the Fairweather fault and field investigation of southern epicentral region
ABSTRACT The Fairweather fault is recognizable as a geologic and geomorphic feature from Palma Bay on the southeast at least as far northwest as Nunatak Fiord east of Yakutat Bay, a distance of 200
A New Class of Faults and their Bearing on Continental Drift
T and half-shears. Many geologists1 have maintained that movements of the Earth's crust are concentrated in mobile belts, which may take the form of mountains, mid-ocean ridges or major faults with
Application of numerical method for S-wave focal mechanism determinations to earthquakes of Kamchatka-Kurile Islands Region
abstract The least squares method for the determination of focal mechanism using S -wave data developed by Udias (1964) has been applied to 34 earthquakes of the Kamchatka-Kurile Islands Regions. For
Sediments and structure of the Japan Trench
Seismic reflection profiles recorded east of Honshu show a fairly uniform thickness of acoustically transparent and presumably homogeneous sediment along the outer ridge and seaward slope of the
Spreading of the Ocean Floor: New Evidence
The hypothesis that magnetic anomalies may indicate the nature of oceanic fracture zones and distinguish the parts of the ridge system that are actively spreading is suggested and data derived during the past year lend remarkable support to the hypothesis.
The focal mechanism of the Alaska earthquake of March 28, 1964, and of its aftershock sequence
Focal mechanisms have been determined for one preshock, for the main shock, and for more than 25 aftershocks of the Alaska earthquake of March 28, 1964. For the main shock a single nodal plane with a
Transcurrent faults in continental areas
  • C. Allen
  • Geology
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1965
Seismic fault-plane solutions, displacements observed during historic earthquakes, and an increasing number of geological reports of active transcurrent faults in many parts of the world all suggest
Data from a contour map of the submarine topography surrounding the Near Islands, from the companion map of the Rat Islands by Gibson and Nichols (1953), and from the geology of the western Aleutian
The Alaska earthquake of July 10, 1958: Seismic studies
ABSTRACT The instrumental epicenter of the Alaska earthquake of July 10, 1958, has been located on the hanging-wall side of the Fairweather fault near the surface expression of the fault and at the
Mechanism of earthquakes and nature of faulting on the mid‐oceanic ridges
The mechanisms of 17 earthquakes on the mid-oceanic ridges and their continental extensions were investigated using data from the World-Wide Standardized Seismograph Network of the U. S. Coast and